from the Specialty line of OAS brushes a compact multitude of short stiff hairs give BIFF Brush a lot of body offers more options for texture great for wet or dry style tree trunks, thick vines, texture strokes for mountains, rocks and cliffs use to create spectacular foliage, moss and all kinds of coarse texture effortlessly These new combination brushes are great for doing wet or dry style tree trunks, thick vines, and texture strokes for mountains, rocks and cliffs. They feature a compact multitude of short stiff hairs that give the brush a lot of body. When the bristles spread, they turn punk-rocker. You can strike your paper to create spectacular foliage, moss, and all kinds of coarse texture effortlessly.